> The 2.0 update, it turns out, aggressively rewrites the default application paths to the point where it's impossible, at the time of writing, to have both versions of Antigravity installed and functioning at the same time.

Maybe it’s an OS difference but on my Mac when the new crappy antigravity updated, I got a very helpful dialog box explaining the changes and offering to download and install Antigravity IDE. Of course I did so and both run happily at the same time. Well, they did the one time I launched both, but now I’m back to just using the IDE.